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Load Diff
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use std::io;
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use regex::Regex;
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use day::Day;
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pub struct Day05 {
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input: String,
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}
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impl Day05 {
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fn is_nice(string: &String) -> bool {
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Day05::has_three_vowels(string) &&
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Day05::has_double_letters(string) &&
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Day05::has_no_substrings(string)
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}
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fn has_three_vowels(string: &String) -> bool {
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let three_vowels = Regex::new(r"[aeiou].*[aeiou].*[aeiou]").unwrap();
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three_vowels.is_match(string)
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}
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fn has_double_letters(string: &String) -> bool {
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for win in string.as_bytes().windows(2) {
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if win[0] == win[1] {
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return true;
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}
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}
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false
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}
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fn has_no_substrings(string: &String) -> bool {
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!vec!["ab", "cd", "pq", "xy"].iter().any(|&s| string.contains(s))
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}
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}
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impl Day for Day05 {
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fn new(input: String) -> Day05 {
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Day05 { input: input }
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}
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fn solve(&self) -> io::Result<i32> {
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Ok(self.input.lines().filter(|&s| Day05::is_nice(&s.to_string())).count() as i32)
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}
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}
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#[test]
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fn test_nice() {
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assert!( Day05::is_nice(&"ugknbfddgicrmopn".to_string()));
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assert!( Day05::is_nice(&"aaa".to_string()));
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assert!(!Day05::is_nice(&"jchzalrnumimnmhp".to_string()));
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assert!(!Day05::is_nice(&"haegwjzuvuyypxyu".to_string()));
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assert!(!Day05::is_nice(&"dvszwmarrgswjxmb".to_string()));
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}
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